Printing attachment for roll-paper holders.



Patented July Il, |899.V

lNIUN\\\\\\\\\ Invenor BUELL. PRINTING ATTACHMENT FOR RULL PAPER HOLDERS (Application led Sept. 22, 1898.)

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NITED STAT-ns' PATENT OFFICE.

JOSEPH VIIITMAN BUELL, OF USI-IINGTON, DISTRICT OF COLUMBIA.

PRINTING ATTACHMENT FOR ROLL-'PAPER HOLDERS.

SPECIFICATION forming part 0f Letters Patent No. 628,445, dated July 11, 1899. Application tiled September 22, 1898. -Serial No. 691,572. (No model.)

T0 all whom, t may concern,.-

Be it known that I, JOSEPH WHIrMAN` therefor that involves the novel arrangement of a special type of spring-1 2'. e., in so applying a spring-bar or overcoiled spring in relation to the axis of the paper-roll and the pivotal structure carrying the printing-cylinder that the limits of the latters angular movement caused by the spring in recovering its natural line of structural adjustment is increased in sweep from the limit of angular movement ninety degrees on one side of said paper-roll axis to a like limit of angular travel on the other side thereof before said spring reaches its neutral point. As the Varying force of the elastic tension of the spring corresponds with the distance it occupies from normal position, it is proposed to utilize the force action of the spring for the purposes of this invention in the quadrant in which it is greatest and in which the comparative angular movement is more extensive than the absorption of tension when the mechanism is operating, whereby the yielding pressure eX- erted by the printing-cylinder against the paper-roll in the direction of the axis thereof will be but little diminished from the largest to the smallest diameter of the paper-roll as the paper is consumed. The obtainment of this bet-ter force action, which results in more effective operation within the prescribed limits than heretofore obtained, is due to the employment of a type of spring'which provides an elastic lever-arm that may be continued.

to form coils that have long arcs which distend in reaction with less easement as compared to the predetermined angular movements of the pivotal structure obtained by its employment than has been found possible by any mode of application of any other type of spring heretofore employed to produce motion and pressure in like devices.

IfIeretoforevarious spring-operated mechanisms have been provided for controlling the motionand pressure of a rotary type-cylinder in relation to the paper-roll; but they have been practically inoperative because the .spring-Wire of the coils employed was of a gage that created such friction or pressure between the cylinder and the paper-roll that the underlying paper was torn or marred in withdrawing it, or if the coils were made of spring-wire of a smaller gage, such as to be sufficiently powerful for properly holding the pri nting-roller on the paper-roll of greatest diameter, the tension therein would be so Weak as to yield in an undesirable manner when the paper-roll had diminished in size by consum ption.

In the drawings, Figure l represents a sectional view of a paper-roll holder and roll with my attachmentin position. Fig. 2 represents in perspective the attachment removed from the holder.

Referring to the accompanying drawings, in which like letters of reference indicate like parts, Aindicates a paper-roll holder of ordinary construction comprising the usual side standards O of any preferred construction, while D represents the cross-bar. B represents the horizontal shaft, which is passed through the roll of paper and is mounted in open bearings (not shown) that project from the inner sides of the side standards. The roll thus mounted is prevented from unreeling by the employment of the ordinary springcontrolled pendent curved bracket or bailC', that is pivotally suspended from the crossbar and which is provided with a tearing-bar B', that is adapted to be constantly depressed angularly in a radial direction by reason of the exertion of the spring-coil Qc that is arranged o'n the shaft of the bracket. Positioned on the opposite side of the cross-'bar is centrally arranged a supporting-plate E. Pivotally attached to said plate is a swing han ger-frame D, that is j ournaled to the lower face by means of the collars S. Thehanger-frame is shown of substantially rectangular shape, made in skeleton form from sheet metahwhile the arms IOO ` by means of the bail g, that ispivotally Vsusssf g, p l 628,445

d thereof are connected rigidly at their upper ends by a bar or shaft p and at their lower ends by a tie-bar d', which latter is detachably fas- Vis the axis of the roll of paper, thereby enabling the type-cylinder to always press angularly in a radial direction until it reaches the center of the unreeled roll. The typecylinder is provided on its ends with side flanges f, that press at all times on the paper.

roll, causingsaid cylinder to rotate thereon kwhen the paper-roll is turned. cylinder is also provided on'its periphery, in-

termediate of its side iianges, with rubber ori other suitable surface, upon which the type t i'sarranged to protrude sufficiently to reach `the 'paper `(top sheet) and make a clean and The printing-cyl` inderis adapted to rotate inthe direction of:

clear impression thereon.

the'arrow shown, and to prevent back turning of said cylinder there i`s provided a pawland-ratchet mechanism r, that is shown in connection with the trunnion t. Parallel with said printing-cylinder and superimposed thereon is an inking-roller G, which is of the same length and is provided with like flanges that vrest on those lof the .type-cylinder and which is supported in proper relationthereto pendedfrom the hanger-frame vside bars by reason of the arms g', journaled, respectively,

in the holes'therein. The inking-roller isprovided with absorbent material, which is saturated With ink and which contacts with the type on the printing-cylinder by the rotary movement thereof when the type-cylinder revolves. When the pressure ofthe roller G upon the type-cylinder is not sufcient to maintainv it in constant contact with said cylinder, a spring s may be employed as an auxiliary to the weight thereof to accomplish that end.

Y V'represent volute springs that are arranged in spaced parallelism and are located within the slots 7c of plate E, secured at one end by screws s', and which are adapted to engage at one end with the upper face of the plate VE and at their other-respective ends vor terminals with theshaft l?.

V The said plate and Vhanger-frame are then turned in opposite directions against the tension of the overcoiled springs until there is sufficient energy stored for the purpose of carrying the pivotal structure or hanger through its iield of travel. The office of these springs is to hold the printing-cylinder upon the roll of paper regardless of what angle the hanger-frame The pri nting.

assumes, and thereby allow the frame to adjust itself with proper pressure to the gradually-diminishin g size of the roll.. When the springs are thus arranged in spaced parallelism, they allow the printing-cylinder a lateral yielding movement to permit the printingcylinder to assume a position to compensate for any unevenness in the roll of paper. "When the springs have been sufficiently coiled, the plate E is secured to the under face of the cross-bar D by screws y. The hangerframe thus attached will tend to stand out at right angles to the side of the cross-'bar opposite to the location of the plate E, but when positioned for laborit is swung over against the spring tension of the springs to its full limit on the other side and heldin that position until the roll of paper has been mounted on its shaft, when the type-cylindercarried by said frame will be supported in operative position against the roll by reason of the recoil condition of said springs. When the pa per-roll is turned, it will cause the rotation of the type-cylinder and the inking-roller in the direction indicated by the arrows. Owing to the location of said springs and the manner'of disposing and applying'the spring force thereof the angular movement of the hangerframe has little effect upon the tension of the springs and the pressure exerted thereby is practically constant within the possible range of travel of said frame-'11. c., until the typecylinder has reachedthe center of the roll of paper and the last sheet thereof has been unwound.

The operation of this attachment is apparent from the foregoing description.

It will beseen that this automatic printing attachment for roll-paper holders is exceedingly simple and inexpensive in construction and is positive and reliable in operation and will insure a perfect impression even when the paper-roll-has unwound to the last sheet.

What I claim as new and useful is- Il. The combination with a paper-reel of a pivotal structure that is suspended centrally from the cross-arm of the reel to one side thereof, and that is adapted to carry a printing-cylinder and an overcoil-spring larrangedV in operative relation to said pivotal structure as and for the purpose set forth. Q

2. Aprin'ting attachment for paper-holders comprising a hanger designed to be hinged to the frame of the holder a printing-cylinder in the hanger and an inking-roll mounted in the hanger contacting with the printing-cylotal structure, and a pair of parallel spaced IIO oVereoil-springs arranged Within slots in said In testimony whereof I affix my signature plate, said springs being adapted to engage in presence of two Witnesses. respectively at one end With the upper face of the plate and at their other terminals with y JOSEPH WHITMAN BUELL 5 the shaft of said pivotal structure, the Whole Witnesses: arranged and operating substantially as de- WANDA A. BELL, scribed. RALPH S. WARFIELD. 

